The economical analogy is useful in physiology and ecology for analysis of interaction of
different factors. [1]} analysed interaction of factors in human
physiology and demonstrated that adaptation makes the limiting factors equally important.
These results underly the method of correlation adaptometry, that measures the level of
adaptation load on a system and allows us to estimate health in groups of
healthy people [2]}. For plants, the economical metaphor was elaborated by
[3]} and developed further by [4]}.
They also merged the optimality and the limiting approach and used the notion of
`exchange rate' for factors and resources. For more details and connections to
economical dynamics we refer to [5]}. For
systems of factors with different types of interaction (without limitation) adaptation
may lead to different results [6]}. In particular, if there is synergy between several harmful factors, then adaptation should make the influence of
different factors uneven and may completely exclude (compensate) some of them.
